biochemistry

Which statements about hydrogen bonds are correct?

1) Hydrogen bonds are the interaction between a hydrogen atom bonded to an electronegative element and the lone pair of electrons on a nearby electronegative atom.
2) The atom to which the hydrogen atom is covalently bonded is the hydrogen-bond donor.
3) The distance between the covalently bound H atom and its hydrogen-bonding donor is the sum of its van der Waals radii.
4) Hydrogen bonds can be stronger interactions than even charge-charge interactions.

2, 3, and 4 are correct.
1, 2, and 3 are correct.
1, 2, and 4 are correct.
All of the listed statements are correct.

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